# HALOWERK Southern Land – Malta Soil Organic Carbon (0-5 cm)

> HALOWERK Southern Land – Malta Soil Organic Carbon (0-5 cm) is a paid API for AI agents from suedland.halowerk.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-15).

Returns the mean SoilGrids organic carbon value for the 0-5 cm depth layer at a given coordinate within Malta's boundary.

## Facts

- Endpoint: POST https://suedland.halowerk.com/v1/mt-soil-organic-carbon
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-southern-land-malta-soil-organic-carbon-0-5-cm-29afd024
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QaGZ_iOWo3-IQSc6w-O9X

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability halowerk-southern-land-malta-soil-organic-carbon-0-5-cm-29afd024 -d '<json body>'
```

Example prompt: What's the mean soil organic carbon in the top 5 cm at latitude 35.9 and longitude 14.5 in Malta?

## When to prefer this

Choose this endpoint when you need SoilGrids-derived mean organic carbon specifically for a surface soil layer (0-5 cm) at a point location within Malta. It is ideal for per-point lookups rather than bulk raster downloads, and is validated against Malta's official boundary so off-island coordinates are caught early. Pair with sibling endpoints on the same host for complementary soil properties (pH, nitrogen, clay fraction, CEC) at the same coordinate.

## Known failure modes

- Coordinate outside Malta's Natural Earth boundary — request rejected with a validation error before payment
- Latitude or longitude outside the declared European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation failure
- No SoilGrids data available for the specific pixel — may return null or no-data value
- Malformed JSON body — returns 400-level error
- Payment failure via x402 protocol — request not processed

## How this service works

Mean SoilGrids organic carbon for the 0-5 cm layer. The coordinate is validated against the Natural Earth boundary for Malta; results outside it are rejected before payment.

## Output

Returns the mean SoilGrids organic carbon value (typically in g/kg or dg/kg as per SoilGrids convention) for the 0-5 cm soil depth layer at the requested coordinate, validated to fall within Malta's Natural Earth boundary. Coordinates outside Malta are rejected before any charge is incurred.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "latitude": {
   "type": "number",
   "maximum": 72.5,
   "minimum": 34,
   "description": "WGS84 latitude inside the published European coverage."
  },
  "longitude": {
   "type": "number",
   "maximum": 40.5,
   "minimum": -31.5,
   "description": "WGS84 longitude inside the published European coverage."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/halowerk-southern-land-malta-soil-organic-carbon-0-5-cm-29afd024/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from suedland.halowerk.com](https://www.zero.xyz/host/suedland.halowerk.com/llms.txt)